U.S. mammography rates drop following task force recommendations

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THURSDAY, June 28 (HealthDay News) -- The number of women in their 40s getting routine mammograms has dropped since the U.S. Preventive Services Task Force advised against regular screenings for women in this age group, according to a new study.

Researchers from the Mayo Clinic found that the controversial guidelines resulted in a nearly 6 percent decline in mammography rates across the United States. Although the decline is small, it's significant, the researchers noted.

"The 2009 USPSTF guidelines resulted in significant backlash among patients, physicians and other organizations, prompting many medical societies to release opposing guidelines," study co-author Nilay Shah, a researcher at the Mayo Clinic Center for the Science of Health Care Delivery, said in a clinic news release. "We were interested in determining the impact that the recommendations and subsequent public debate had upon utilization of mammography in younger women."

Using a national database of 100 health plans, the researchers identified 8 million women between the ages of 40 and 64 years old who had gotten a mammogram between January 2006 and December 2010.

To determine the effects of the task force's recommendation on mammography rates, the researchers compared the number of screenings that took place before the guidelines were issued to the number of screenings that occurred after they came out.

The study found that the recommendations were associated with a 5.72 percent drop in mammography rates for women between 40 and 49 years old. This represents 54,000 fewer mammograms for these women over one year, the researchers said.

"For the first year after the guidelines changed, there was a small but significant decrease in the rate of mammography for women ages 40-49," said Shah. "This is consistent with the context of the guidelines change. A modest effect is also in line with the public resistance to the guidelines change and the subsequent release of conflicting guidelines."

The Mayo Clinic and the American Cancer Society recommend that all women 40 and older have an annual mammogram.

"Screening mammography is not a perfect exam, but it is the best available tool to detect cancer early," Dr. Sandhya Pruthi, director of the Mayo Clinic's Breast Clinic, said in the news release. "Early detection can lead to better options and possibly less-aggressive treatments."

The Mayo researchers urged women to become familiar with their breasts to help them identify any changes that might need further evaluation by a doctor. They added that all women should have an annual clinical breast exam performed by a doctor beginning at age 40.

The study was expected to be presented this week at the Academy Health Annual Research meeting in Orlando, Fla. Data and conclusions presented at meetings should be considered preliminary until published in a peer-reviewed medical journal.

More information

The U.S. National Cancer Institute provides more information on mammograms.

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